It's done in purpose. There are also a bunch of similarly "duplicated" entries in c64.c. The idea is to have an entry for each different model sold (see also many Sharp Pocket Computers or Sega SC3000/SC3000h or Dina's different Coleco clones), possibly with different artworks (e.g. if we start to implement clickable keyboard we will need good scan of the different PET2001 'chicklet' and full stroke keyboards).

Originally Posted By k1w1

The Pet 40xx & 80xx are pretty much the same as CBM 40xx & 80xx as well.

Only the old models. The new ones have a different ROM with support for 60Hz / 50Hz CRTC. And models with normal keyboard vs business keyboard have different BIOSes as well (to support larger chargen in the latter ones, and numbers only on the keypad in the former ones)

Originally Posted By k1w1

The commodore structure tree's although better than before are still generally pretty screwy.

If you read the notes at the top of the driver you'll see that it reflects much better the informations from here and here.

I don't claim it's perfect, but I can ensure I spent hours to sort the previous mess (no pun intended) and the contradictory info you can find around in the web. The final goal is to make MESS source a reliable document about the original hardware (that's why there is no more CBM 20xx series, which is unconfirmed and probably fake: PET european models became CBM 30xx) and I'd like to improve it, if possible: if you find inaccuracies please be a little more precise than "are still generally pretty screwy"

Originally Posted By k1w1

And the PC/AT (VGA, MF2 Keyboard) should be placed in the IBM PC/AT 5170 tree

pc.c work is wip and only half done (see http://mess.toseciso.org/people:wilbert_pol ). newly added sets 5150, 5160 & 5170 (with clones) are actively worked on. old sets like pc, atvga and all the amstrad models are still in the previous (bad) shape, untouched. Judge will sort them out later for sure, when he's satisfied by the emulation status.

I don't think Judge has finished EGA yet. I'm sure VGA will get sorted in time though

The EGA is locally passing all of it's POST tests. The EGA POST tests use some of the timers which are causing a timer irq some time later and that is causing the AT BIOS timer tests to break somehow.

I also have quite some updates for the DMA controller locally. The DMA locally is triggered by timer 1 to execute the RAM refreshes. I first need to get rid of the ugly DMA hack used by the pc_hdc code.

In other news: The cassette code has been changed into a mame device, this may be causing some regressions. This change also made it clear that some driver say they support cassettes but they actually simply copy the data into RAM or do some other 'evil' things. These things should hopefully be fixed before the next release. Reports of broken cassette implementations are welcome. The driver files known to have broken cassette implementations are: cgenie, intv, jupiter, nascom1, osi, ti990_10, trs80, tx0, kim1.

Thanks for explaining, it makes a bit more sense now. The Commodore product line is just so full of variants and alternate names it gets confusing.

k1w1

Reading back my answer, I could have sounded harsher than I meant. I should add more emoticons, even when I'm in hurry

About Commodore, they had indeed plenty of small variations among models and it's been a pain to sort them out. It could well be that a few of the duplicate sets will be removed later, if there was really no difference between them. However, if you find any mistake please report it, I could have easily overlooked or misunderstood some of the sources.

Originally Posted By Anna Wu

SVN 3247

The max driver (Ultimax)is not working for me.I still get a black screen. Is this ok ?

Yeah. Or better, it's the best you can expect right now. It will be fixed eventually, when the emulation improves. The system at least doesn't crash when you load a cart (which was a bug reported in bugzilla), but the NOT_WORKING flag will be probably added in 0.128 if we cannot fix it before.

It's done in purpose. There are also a bunch of similarly "duplicated" entries in c64.c. The idea is to have an entry for each different model sold (see also many Sharp Pocket Computers or Sega SC3000/SC3000h or Dina's different Coleco clones), possibly with different artworks (e.g. if we start to implement clickable keyboard we will need good scan of the different PET2001 'chicklet' and full stroke keyboards).

Will the different duplicate Master Systems be added? I remember a driver for the Master System III Compact (the first system I owned), but it was removed =(.

For systems where they're electrically identical but the case is different I would recommend making the clones different views in the layout file rather than cluttering up MESS with useless duplicate drivers.